want

Compared meaning: to want something (verb).

比较义项：想要，希望得到某事物（动词）。

• want 本词

  The everyday, neutral word for wishing for something; extremely common in casual speech and requests, followed by a noun or an infinitive.

  want是口语中最常用、语气中性的“想要”，常用在日常请求和需求中，后面可接名词或动词不定式。

  I just want a few quiet minutes to finish this report.

  我只是想要几分钟的安静时间来完成这份报告。

• desire

  A stronger, more formal or literary word for wanting something very much; suggests deep longing and sounds odd for small everyday requests.

  desire语气更强烈，属于较正式或文学性的表达，指强烈的渴望，用在日常琐事的请求上会显得不自然。

  He desires nothing more than to see his children succeed.

  他最大的渴望就是看到自己的孩子们成功。

Want and desire both mean to want something. Want is the neutral, everyday word, common in casual speech and requests. Desire is stronger, more formal, showing deep longing, and sounds strange for small requests. Desire as a noun meaning 'a wish' is not compared here.

这两个词在“想要”这一义项上意思相近，但语气强弱和正式程度不同：want语气中性，日常口语中很常用；desire语气更强烈，更正式，多用于书面或情感表达，日常琐事中很少使用。desire作名词表示“愿望，欲望”的用法这里不比较。

Compared meaning: not having enough of something (noun).

比较义项：缺乏、不足（名词）。

• want 本词

  Formal or literary; now mainly survives in set phrases like 'for want of' or 'in want of', rarely used alone as a noun in everyday speech.

  正式或文学化用法；现在主要保留在固定搭配中，如“for want of”（因缺乏……）或“in want of”（缺……的），日常口语中很少单独作名词使用。

  The old cottage was clearly in want of repair after years of neglect.

  这栋老农舍多年疏于打理，显然亟需修缮。

• lack

  The plain, everyday word for not having enough of something; used freely in almost any spoken or written context.

  最普通、最常用的词，表示某物不够或没有；几乎可用于任何口语或书面语境。

  There's a lack of parking spaces near the new office building.

  新建的办公楼附近停车位不足。

• deficiency

  More formal and technical; typically describes a specific, measurable shortfall, especially in health, nutrition or quality standards.

  更为正式和专业；通常指具体、可衡量的不足，尤其用于健康、营养或质量标准方面。

  Untreated iron deficiency can leave you feeling tired and weak.

  如果不加以治疗，缺铁会让你感到疲惫无力。

Want, lack, and deficiency can mean not having enough of something. Want is formal, mostly seen in phrases like 'for want of'. Lack is the plain, everyday word, used freely in speech. Deficiency is more formal and technical, describing a shortfall in health or nutrition.

这三个词都可表示“缺乏、不足”，但语体和搭配不同：lack 最常见、最中性；want 作此义时较正式或文学化，常见于固定搭配，如for want of（因缺乏……）、in want of（缺……的）；deficiency 更正式、专业，常用于医学、营养或质量标准语境，强调达不到应有的量。这里不比较want作动词“想要”的义项。